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각종 간질환에 있어서 이상 prothrombin(des-γ-carboxyprothrombin)에 관한 연구

Other Titles
 (a) Study on des- γ-carboxyprothrombin(DCP, PIVKA-II) in liver diseases 
Authors
 이혁우 
Issue Date
1989
Description
의학과/석사
Abstract
[영문]

[한글]

비타민K가 결핍된 환자나 비타민K 길항제를 투여한 환자에서는 간에서 비타민K 의존성

carboxylase활성도를 억제하며 각종 간질환, 특히 간세포암과 간경변증 환자에서 des -γ

- carboxyprothrembin(DCP) 또는 PIVKA-Ⅱ (protein induced by vitamin K absence or an

tagonist -Ⅱ)로 알려진 이상(異常) prothrembin이 혈중으로 유리된다.

이에 연구자는 각종 간질환 환자에서 이상 prothrombin의 검출율과 그 임상적 의의, al

pha-fetoprotein(AFP)과의 상호관계 및 혈청 종양표지자로서의 유용성을 알아보기 위하여

1988년 1월부터 1989년 4월까지 연세대학교 의과대학부속 세브란스병원 내과에 입원하였

던 간세포암 70예, 전이성 간암 7예, 간경변증 45예, 만성활동성 B형간염 6예, 급성 B형

간염 13예, 지방간 3예, 간농양 Ⅰ예 및 정상대조군 20예를 대상으로 라텍스 응집법으로

이상 prothrombin을 측정하여 다음과 같은 결과를 얻었다.

1. 이상 prothrombin의 검출율은 간세포암에서 60.0%, 전이성 간암 42.9%, 간경변증 51

.1%, 만성 활동성 B형간염 16.7%이었으나 건강한 정상인 및 급성 B형간염, 지방간 그리고

간농양에서는 모두 검출감도 이하였다.

2. 간세포암에서 이상 prothrombin의 검출율은 종양의 크기가 5m이상인 진행예에서는 6

6.7 %, 3∼5cm사이의 중등도 진행예에서는 44.4 %였고, 3 cm미만인 소간세포암에서는 4예

에서 모두 검출감도 이하로서 종양의 크기가 클수록 높은 경향이었으며, 간경변증의 경우

에서는 심한 간기능 장해(class C)를 가진예에서는 60%, 중등도의 간기능 장해 (class B)

를 가진예는 25 %였으나 거의 정상수준의 간기능(class A)을 유지하는 2예에서는 모두 검

출감도 이하로서 심한 간기능 장해를 가진 진행예에서 높은 경향을 보였다.

3. 간세포암에서 이상 prothrombin과 AFP사이에는 유의한 상관관계가 없었으나, AFP 저

농도의 많은 예(62.5 %)에서도 이상 prothrombin이 양성이었으며, 이상 prothrombin이 양

성이거나 AFP가 양성인 예는 간세포암 전체의 91.4 %이었다.

4. 간경변증중 prothrombin time이 연장된 경우에 이상 prothombin의 검출율은 56.8 %

인데 반하여 간세포암에서는 prothrombin time이 정상일때도 이상 prothrombin이 63.0 %

에서 양성이었다.

5. 비타민K^^1 투여전에 양성으로 검출된 간세포암 13예와 간경변증 9예에 비타민K^^1

을 10 mg씩 5일간 투여한 뒤, 투여전후의 이상 prothrombin 검출농도를 비교한 결과 간세

포암에서는 13예 모두에서 비타민 K^^1 투여전후에 아무런 변동이 없었으나, 간경변증에

서는 9예중 7예에서 비타민K^^1 투여후에 검출농도가 감소되었으나 검출감도 이하였다 (P

<0.05).

이상의 결과로, 각종 간질환에서 라텍스응집법에 의한 이상 prothrombin의 측정은 간세

포 장해의 지표로서 유용하다고 생각되며, 간세포암의 종양표지자로서 감수성과 특이성에

대해서는 아직 결론을





A Study on Des-γ-Carboxy Prothrombin(DCP, PIVKA-Ⅱ) in Liver Diseases



Hyurk Woo Lee

Department of Medical Science The Graduate School Yonsei University

(Directed by Professor In Suh Park, M.D.)



The absence of vitamin K or the ingestion of vitamin K antagonists inhibits

vitamin K-dependent carboxylase activity in the liver, and an abnormal prothrombin

known as des- γ -carboxy-prothrombin(DCP), or PIVKA-Ⅱ(protein induced by vitamin

K absence or antagonists-Ⅱ), is released into the blood.

In order to evaluate whether abnormal prothrombin levels can be clinically used

as an index of hepatocellular dysfunction or as a tumor marker of hepatocellular

carcinoma(HCC), abnormal prothrombin levels were determined by a latex

agglutination test in 20 normal subjects and in patients with various liver

diseases including 70 hepatocellular carcinoma, 7 metastatic liver disease, 45

liver cirrhosis, 13 acute viral hepatitis B, 6 chronic active hepatitis B, 3 fatty

liver and 1 liver abscess. The usefulness of the combination assay of plasma

abnormal prothrombin and alphafetoprotein(AEP) levels to improve diagnostic value

and the effects of vitamin K administration on abnormal prothrombin levels were

assessed in the present study.

The results obtained were as follows :

1. Abnormal prothrombin was detected in 42 of 70 patients with HCC(60.0%), in 3

of 7 patients with metastatic liver disease(42.9%), in 23 of 45 patients with liver

cirrhosis(51.1%), and in 1 of 6 patients with chronic active hepatitis B(16.7%),

but there was no detectable abnormal prothrombin among 20 healthy control subjects,

13 acute viral hepatitis B, 3 fatty liver and 1 liver abscess.

2. The detection rates of abnormal prothrombin according to the size of the HCC

were 66.7% in the larger than 5cm size and 44.4% in the 3-5cm size, but there was

no detection in 4 patients with smaller than 3cm size.

The detection rates of abnormal prothrombin according to Child's classification

of liver cirrhosis were 60% in class C and 25% in class B, but there was no

detection in 2 patients with class A.

3. There was no significant correlation between abnormal prothrombin and AFP

Level. However, abnormal prothrombin was also detected 62.5% in less than 400ng/ml

of AFP and the positive rates were 91.0% in higher than 400ng/ml of AFP or higher

than 1:10(+) of abnormal prothrombin in patients with HCC.

4. The detection rate of abnormal prothrombin was 56.8% in liver corrhosis

patients with prolonged prothiombin time(PT). However, 61.4% was detected in HCC

patients with normal levels of prothrombin time (PT).

5. On observation of the effectiveness of vitamin K administration on abnormal

prothrombin level, there was no effectiveness of vitamin K administration in all

patients with 13 HCC, but an abnormal prothrombin level was decreased or not

detected in 7 of 9 patients with liver cirrhosis after vitamin K administration.

Based on these results, abnormal prothrombin determined by a latex agglutination

test may be useful as an index of hepatocellular dysfunction. However, due to the

lower specificity and not ligher sensitivity of the latex agglutination test, it is

doubtful whether an abnormal prothrombin is a definite tumor marker of HCC. But the

combination assay of AFP and abnormal prothrombin is helpful for obtaining an

increased diagnostic rate of HCC.

The author recommended comparison of the effectiveness of vitamin K

administration on abnormal prothrombin concentration during the follow-up

observation of chronic liver disease, such as liver cirrhosis, for the early

diagnosis of HCC. Further study utilizing methods such as RIA or ELISA might be

needed to evaluate the usefulness of abnormal prothrombin as a tumor marker for HCC

.
Full Text
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